Modicon M221 TM221C16T Transistor PLC 24V DC Schneider

Modicon M221 TM221C16T Transistor Output Logic Controller

Product Introduction

The TM221C16T is a versatile member of Schneider Electric's Modicon M221 series. This compact logic controller is powered by 24 V DC, making it suitable for mobile and battery-backed applications. It offers 16 discrete I/O points on the base unit, with 7 transistor outputs. Additionally, it includes 2 analog inputs for 0 to 10 V signal monitoring. The TM221C16T stands out with its motion control capabilities, featuring fast outputs for PTO positioning and PWM functions. This PLC supports up to 4 expansion modules, providing excellent scalability for growing automation needs.

Technical Specifications

Discrete I/O Configuration

The TM221C16T provides a total of 16 discrete I/O points. For inputs, it includes 9 discrete inputs conforming to IEC 61131-2 Type 1 standards. Among these, 4 are fast inputs designed for high-speed applications. All inputs operate at 24 V DC and support both sink and source logic configurations. For outputs, the controller features 7 transistor outputs using positive logic (source). Among these, 2 are fast outputs (Q0 and Q1) capable of 100 kHz operation. The remaining outputs offer 5 kHz (Q2, Q3) and 0.1 kHz (Q4-Q6) switching frequencies. This configuration handles diverse load requirements efficiently.

Analog Input Capabilities

The TM221C16T includes 2 analog inputs on the base unit. These inputs accept 0 to 10 V DC signals with a 10-bit resolution. The LSB value is 10 mV, providing adequate precision for process monitoring. Conversion time is 1 ms per channel plus one controller cycle time. For protection, the analog inputs tolerate overloads of +/- 30 V DC for up to 5 minutes and +/- 13 V DC continuously. Consequently, this controller can easily interface with common sensors like pressure transmitters, temperature probes, and potentiometers.

Power Supply Characteristics

This logic controller operates on a rated supply voltage of 24 V DC. The supply voltage limits range from 20.4 to 28.8 V DC, accommodating typical battery and power supply fluctuations. The TM221C16T consumes only 10 W at full expansion and 3.9 W without expansion modules. Its inrush current is limited to 35 A maximum. This low power consumption makes it ideal for energy-sensitive applications. The controller also provides a 24 V DC sensor power supply at 150 mA for the expansion bus.

Memory and Processing Performance

The TM221C16T is equipped with 256 kB of RAM for user application and data storage. This memory accommodates up to 10,000 instructions. Internal variables also use 256 kB of RAM. For data backup, the controller uses 256 kB of built-in flash memory. An optional 2 GB SD card provides additional data storage capacity. Execution time is 0.3 ms per 1,000 instructions, with Boolean instructions executing in just 0.2 µs. The event task response time is 60 µs, ensuring fast reaction to critical events.

Motion Control and Positioning Functions

The TM221C16T excels in motion control applications. It supports PTO (Pulse Train Output) positioning functions for up to 2 axes in pulse/direction mode at 100 kHz. Additionally, it supports 1 axis in CW/CCW mode. The fast outputs (Q0 and Q1) support PWM (Pulse Width Modulation) and PLS (Pulse) functions. Furthermore, the controller includes a frequency generator function. These capabilities enable precise control of stepper motors and servo drives without additional motion modules. Consequently, the TM221C16T is an excellent choice for positioning, speed control, and precision timing tasks.

High-Speed Counting Function

This logic controller includes 4 fast inputs capable of high-speed counting (HSC) mode. These inputs support a counting frequency of 100 kHz with a 32-bit counting capacity. They can operate in single-phase, pulse/direction, or A/B (quadrature) modes. Consequently, the TM221C16T can handle encoder feedback, flow measurement, and position tracking tasks effectively. The fast inputs also have configurable filtering times of 0 ms, 3 ms, or 12 ms for noise immunity.

Communication and Connectivity

The TM221C16T features multiple communication ports for flexible integration. A Mini B USB 2.0 port allows direct connection to a programming terminal. For serial communications, it offers two non-isolated serial links. Serial 1 uses an RJ45 connector with RS485 interface. Serial 2 uses an RJ45 connector with RS232/RS485 interface. Both ports support Modbus RTU/ASCII protocols. The USB port communicates via USB protocol and SoMachine-Network. The transmission rate reaches 115.2 kbit/s for serial and 480 Mbit/s for USB connections. This connectivity enables easy integration with HMIs, drives, and other Modbus devices.

Real-Time Clock and PID Control

The TM221C16T includes a built-in real-time clock with a drift of less than 30 seconds per month at 25 °C. This feature enables time-stamped data logging and scheduled operations. Furthermore, the controller supports adjustable PID regulation. It can handle up to 14 simultaneous PID loops, making it suitable for temperature, pressure, and flow control applications. These advanced features enhance the controller's versatility in process automation.

Mechanical and Environmental Parameters

The TM221C16T is designed for reliable operation in demanding environments. Its IP20 protection rating makes it suitable for control panel installation. The controller measures 90 mm in height, 70 mm in depth, and 95 mm in width. It weighs just 0.346 kg, facilitating easy mounting. For mounting, it supports TH35-7.5 and TH35-15 DIN rails or panel mounting with an optional fixing kit. Operating temperature ranges from -10 to 55 °C for horizontal installation and -10 to 35 °C for vertical installation. Storage temperature ranges from -25 to 70 °C. Relative humidity tolerance is 10 to 95% without condensation. Vibration resistance is 3.5 mm at 5 to 8.4 Hz and 1 gn at 8.4 to 150 Hz. Shock resistance is 147 m/s² for 11 ms. This controller is certified with CE, CSA, CULus, ABS, LR, DNV-GL, and IACS E10 approvals.

Installation Guide

Installing the TM221C16T requires careful attention to wiring and configuration. First, mount the unit on a DIN rail or panel using appropriate hardware. Ensure adequate space for ventilation and cable routing. Next, connect the 24 V DC power supply to the designated terminals, observing the 20.4 to 28.8 V DC range. After that, wire your discrete inputs and outputs according to your application's schematic. For the analog inputs, use shielded cables and keep distances under 1 meter to maintain signal integrity. For fast outputs (Q0, Q1), use shielded cables with a maximum length of 3 meters. Connect the USB or serial ports for programming and communication. Finally, download your application using Schneider Electric's SoMachine software. Always follow local electrical safety standards during installation.

Packaging List

• 1 x Modicon M221 TM221C16T logic controller unit

• 1 x Product quick start guide

• 1 x Removable screw terminal block for inputs

• 1 x Removable screw terminal block for outputs

• 1 x DIN rail mounting clip

Shipping Information

All orders are dispatched using premium global couriers. Your TM221C16T will be shipped via FedEx, UPS, or DHL. This ensures reliable, trackable delivery to your location.

Frequently Asked Questions (FAQ)

1. What is the power supply requirement for this controller?
   The TM221C16T requires a 24 V DC power supply with a voltage range of 20.4 to 28.8 V DC.

2. Does this model support motion control functions?
   Yes, the TM221C16T supports PTO positioning for up to 2 axes and PWM functions on fast outputs.

3. How many analog inputs does this PLC include?
   This logic controller features 2 analog inputs accepting 0 to 10 V signals with 10-bit resolution.

4. What is the maximum output frequency for fast outputs?
   The fast outputs (Q0 and Q1) on the TM221C16T support switching frequencies up to 100 kHz.

5. Can this controller handle high-speed counting?
   Yes, the TM221C16T includes 4 fast inputs supporting HSC mode at 100 kHz with 32-bit capacity.